<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <el-row :gutter='20'>
        <el-col :span='8'>
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear='getGoodsList'>
            <el-button slot="append" icon="el-icon-search"></el-button>
          </el-input>
        </el-col>
        <el-col :span='4'>
          <el-button type='primary' @click="goAddpage">添加商品</el-button>
        </el-col>
      </el-row>

      <!-- table表格区域 -->
      <el-table :data='goodsList' border stripe>
        <el-table-column type='index'></el-table-column>
        <el-table-column label='商品名称' prop='goods_name'></el-table-column>
        <el-table-column label='商品价格' prop='goods_price' width='90px'></el-table-column>
        <el-table-column label='商品重量' prop='goods_weight' width='70px'></el-table-column>
        <el-table-column label='创建时间' prop='add_time' width='140px'>
          <template slot-scope="scope">
            {{scope.row.add_time | dataFormat}}
          </template>
        </el-table-column>
        <el-table-column label='操作' width='130px'>
          <template slot-scope="scope">
            <el-button type='primary' icon='el-icon-edit' size='mini'></el-button>
            <el-button type='danger' icon='el-icon-delete' size='mini' @click="removeById(scope.row.goods_id)"></el-button>
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页区域 -->
      <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="queryInfo.pagenum" :page-sizes="[5, 10, 15, 20]" :page-size="queryInfo.pagesize" layout="total, sizes, prev, pager, next, jumper" :total="total" background>
      </el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  name: 'List',
  data() {
    return {
      // 查询参数对象
      queryInfo: {
        query: '',
        pagenum: 1,
        pagesize: 10
      },
      // 商品列表
      goodsList: [],
      // 总数据条数
      total: 0,
    }
  },
  methods: {
    async getGoodsList() {
      const { data: res } = await this.$http.get('goods', { params: this.queryInfo })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败')
      }
      this.$message.success('获取商品列表成功')
      this.goodsList = res.data.goods
      this.total = res.data.total
    },
    // 只要触发了这个函数就能获取到当为 多少条/页
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    // 当前最新的页码值
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 删除商品数据
    async removeById(id) {
      const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if(confirmResult !== 'confirm'){
        return this.$message.info('已取消删除')
      }
      const {data:res} = await this.$http.delete(`goods/${id}`)
      if(res.meta.status !== 200){
        return this.$message.error('删除失败')
      }
      this.$message.success('删除成功')
      this.getGoodsList()
    },
    // 添加商品 跳转到添加商品页面
    goAddpage(){
      this.$router.push('/goods/add')
    }
  },
  created() {
    // 根据分页获取对应的商品列表
    this.getGoodsList()
  }
}
</script>

<style lang='less' scope>
</style>